School of Physics, The University of New South Wales, Sydney, Australia Program

Mark Friesen | Wiggle Well: engineering valley and spin-orbit properties of silicon

• wiggle well solves two problems: reliably large valley splitting and large intrinsic spin-orbit coupling.
• Valley states compete with the spin as a possible qubit.
• deterministic scheme: find a way to grow the short-period wiggle well.
• randomly dominated scheme: add uniform Ge to the quantum well and reposition the dot.

Kristiaan De Greve (imec) | Si spin qubits fabricated in advanced, industry-standard CMOS facilities

• Si MOS: best for valley splitting, worst for charge noise.
• Si/SiGe: worst for valley splitting, best for charge noise.
• process optimization via Hall characterisation.

Amanda Seedhouse | Wavelet-based methods for noise analysis

• Taking inspiration from climate science (sea surface index) for noise analysis.
• Wavelets are useful for edge detection - robust against 1/f noise.
• if we can break down noise into frequency components, we can understand sources of noise and lead to better controlled pulses.

Maja Cassidy | Experimental progress in hybrid super semi-devices

• Majorana recipe: 1D quantum wire + spin-orbit interaction + superconductivity + magnetic field.
• Soft gap linked to disorder - majorana signatures mimicked by disorder.
• Non-local conductance measurements to measure the full conductance matrix of the device.
• Topological gap protocol: tune to N=1 subband, check local conductance for ZBPs, check non-local conductance for bulk phase transition.

Rainer Blatt | Quantum Simulations with trapped-ion spin chains

• 100 ions in a chain.
• Ca+ qubit.
• measure the state of the qubit by shining in 397 nm light.